PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = FIXED_LENGTH                                          
RECORD_BYTES          = 80                                                    
OBJECT                = TEXT                                                  
  PUBLICATION_DATE      = 1999-03-09                                          
  NOTE                        = "Software Interface Specification for         
                                 the Radio Science Digital Map Product        
                                 (RSDMAP) file.  Formatted for display        
                                 or printing at 58 lines per page with        
                                 up to 78 constant width characters           
                                 per line."                                   
END_OBJECT            = TEXT                                                  
END                                                                           
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                  SOFTWARE INTERFACE SPECIFICATION                            
                                                                              
                                                                              
            RADIO SCIENCE  DIGITAL MAP (RSDMAP) PRODUCTS                      
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                             prepared  by                                     
                                                                              
                          Richard A. Simpson                                  
                        Durand Bldg - Room 232                                
                          Stanford University                                 
                            Stanford, CA                                      
                             94305-9515                                       
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                            Version 2.0.2                                     
                            9  March 1999                                     
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                               PREFACE                                        
                                                                              
|====================================================================|        
|                                                                    |        
|                        DOCUMENT CHANGE LOG                         |        
|                                                                    |        
|====================================================================|        
|REVISION|REVISION|  SECTION   |               REMARKS               |        
| NUMBER |  DATE  |  AFFECTED  |                                     |        
|--------+--------+------------+-------------------------------------|        
|   2.0  |98/04/20|     All    |Adapted from V1.0.2 for MGS and Lunar|        
|        |        |            | Prospector.                         |        
|--------+--------+------------+-------------------------------------|        
|  2.0.1 |98/12/16|    4.2.1   |Change MGS DATA_SET_ID to            |        
|        |        |            |  MGS-M-RSS-5-SDP-V1.0               |        
|--------+--------+------------+-------------------------------------|        
|  2.0.1 |98/12/16| Appendix B |Added examples in B.1 and B.2        |        
|--------+--------+------------+-------------------------------------|        
|  2.0.2 |99/03/09|Distribution|Update list of PDS recipients        |        
|--------+--------+------------+-------------------------------------|        
|  2.0.2 |99/03/09|Acr & Abbrev|Changed "LPX" to "LP" for Lunar      |        
|        |        |     1.2    | Prospector                          |        
|--------+--------+------------+-------------------------------------|        
|  2.0.2 |99/03/09|     2.3    |Generalized use of "nnnnvv" string in|        
|        |        |            | file naming.                        |        
|--------+--------+------------+-------------------------------------|        
|  2.0.2 |99/03/09| Fig. 4-2-3 |Generalized value for pointer        |        
|        |        |            | ^DATA_SET_MAP_PROJECTION            |        
|--------+--------+------------+-------------------------------------|        
|  2.0.2 |99/03/09| Fig. 4-2-2 |Removed keyword UNIT from IMAGE      |        
|        |        |     B.1    | object definition                   |        
|--------+--------+------------+-------------------------------------|        
|  2.0.2 |99/03/09|   1.5.4.1  |Substituted 7-bit ASCII characters   |        
|        |        |   1.5.4.2  | for 8-bit versions                  |        
|========|========|============|=====================================|        
                                                                              
                                                                              
                                                                              
|====================================================================|        
|                                                                    |        
|                     ITEMS TO BE DETERMINED                         |        
|                                                                    |        
|====================================================================|        
| REVISION | SECTION  |  ITEM DESCRIPTION      |     RESOLUTION      |        
|  NUMBER  | AFFECTED |                        |                     |        
|----------+----------+------------------------+---------------------|        
|    2.0   |     5    |Add names, contact info |                     |        
|          |          | for specific scientists|                     |        
|          |          | -- e.g., Balmino, Smith|                     |        
|          |          | and Sjogren for MGS RST|                     |        
|==========|==========|========================|=====================|        
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                             Distribution                                     
                                                                              
JPL/Gravity                                                                   
 A.S. Konopliv............ 301-125J   ask@krait.jpl.nasa.gov                  
 N.   Rappaport............301-125L   Nicole.J.Rappaport@jpl.nasa.gov         
 W.L. Sjogren..............301-150    wls@kamel.jpl.nasa.gov                  
 R.   Wimberly.............301-150    Ravenel.N.Wimberly@jpl.nasa.gov         
 D-N  Yuan.................301-125J   dny@krait.jpl.nasa.gov                  
                                                                              
JPL/Mars Global Surveyor                                                      
 P.   Priest...............264-325    trish@rodan.jpl.nasa.gov                
 T.   Thorpe...............264-214    Thomas.E.Thorpe@jpl.nasa.gov            
                                                                              
JPL/PDS                                                                       
 V.   Henderson............171-264    Valerie.Henderson@jpl.nasa.gov          
 Y.   Oliver...............171-264    Yolanda.Oliver@jpl.nasa.gov             
                                                                              
Stanford University                                                           
 R.   Simpson...........Durand 232    rsimpson@magellan.stanford.edu          
 J.   Twicken...........Durand 232    joe@neptune.stanford.edu                
 L.   Tyler.............Durand 232    len@nova.stanford.edu                   
                                                                              
Washington University                                                         
 R.E. Arvidson.....Campus Box 1169    arvidson@wunder.wustl.edu               
 J.   Alexopoulos..Campus Box 1169    jim@wuzzy.wustl.edu                     
                                                                              
Goddard Space Flight Center                                                   
 F.   Lemoine.............Code 926    flemoine@olympus.gsfc.nasa.gov          
 D.   Rowlands............Code 926    dave@usgrant.gsfc.nasa.gov              
 D.E. Smith...............Code 920    dsmith@tharsis.gsfc.nasa.gov            
                                                                              
Massachusetts Institute of Technology                                         
 M.   Zuber.................54-518    zuber@tharsis.gsfc.nasa.gov             
                                                                              
CNES                                                                          
 G.   Balmino.................GRGS    balmino@pontos.cst.cnes.fr              
                                                                              
Mars Global Surveyor/Thermal Emission Spectrometer                            
 G.   Mehall......ASU Geology Dept    mehall@esther.la.asu.edu                
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                               Contents                                       
                                                                              
                                                                              
Preface.............................................................ii        
  Document Change Log...............................................ii        
  Items to be Determined............................................ii        
  Distribution.....................................................iii        
  Contents..........................................................iv        
  Acronyms and Abbreviations........................................vi        
                                                                              
1. General Description...............................................1        
  1.1. Overview......................................................1        
  1.2. Scope.........................................................1        
  1.3. Applicable Documents..........................................1        
  1.4. System Siting.................................................1        
    1.4.1. Interface Location and Medium.............................1        
    1.4.2. Data Sources, Transfer Methods, and Destinations..........1        
    1.4.3. Generation Method and Frequency...........................2        
  1.5. Assumptions and Constraints...................................2        
    1.5.1. Usage Constraints.........................................2        
    1.5.2. Priority Phasing Constraints..............................2        
    1.5.3. Explicit and Derived Constraints..........................2        
    1.5.4. Documentation Conventions.................................2        
      1.5.4.1. Data Format Descriptions..............................2        
      1.5.4.2. Time Standards........................................3        
      1.5.4.3. Coordinate Systems....................................3        
      1.5.4.4. Limits of This Document...............................3        
      1.5.4.5. Typographic Conventions...............................3        
                                                                              
2. Interface Characteristics.........................................4        
  2.1. Hardware Characteristics and Limitations......................4        
    2.1.1. Special Equipment and Device Interfaces...................4        
    2.1.2. Special Setup Requirements................................4        
  2.2. Volume and Size...............................................4        
  2.3. Labeling and Identification...................................4        
  2.4. Interface Medium Characteristics..............................5        
  2.5. Failure Protection, Detection, and Recovery Procedures........5        
  2.6. End-of-File Conventions.......................................5        
                                                                              
3. Access............................................................6        
  3.1. Programs Using the Interface..................................6        
  3.2. Synchronization Considerations................................6        
    3.2.1. Timing and Sequencing Considerations......................6        
    3.2.2. Effective Duration........................................6        
    3.2.3. Priority Interrupts.......................................6        
  3.3. Input/Output Protocols, Calling Sequences.....................6        
                                                                              
4. Detailed Interface Specifications.................................7        
  4.1. Structure and Organization Overview...........................7        
  4.2. Detached PDS Label............................................7        
    4.2.1. Label Header..............................................7        
    4.2.2. Image Object Definition...................................9        
    4.2.3. Image Map Projection Object Definition...................10        
  4.3. Data File....................................................11        
                                                                              
5. Support Staff and Cognizant Personnel............................12        
                                                                              
                                                                              
Appendix A.  Binary Data Format.....................................13        
  A.1. IEEE Integer Fields..........................................13        
  A.2. IEEE Floating-Point Fields...................................13        
  A.3. VAX Integer Fields...........................................14        
  A.4. VAX Floating-Point Fields....................................15        
                                                                              
Appendix B.  Example Data Products..................................16        
  B.1. Example Label................................................16        
  B.2. Example Data Object..........................................17        
                                                                              
Figures                                                                       
  4-2-1. RSDMAP Label Header.........................................7        
  4-2-2. RSDMAP Image Object Definition..............................9        
  4-2-3. RSDMAP Image Map Projection Definition.....................10        
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                      Acronyms and Abbreviations                              
                                                                              
      ANSI      American National Standards Institute                         
      ARC       Ames Research Center                                          
      ARCDR     MGN Altimetry and Radiometry Composite Data Record            
      ASCII     American Standard Code for Information Interchange            
      ASU       Arizona State University                                      
      CD-WO     compact-disc write-once                                       
      CNES      Centre National d'Etudes Spatiales                            
      dB        Decibel                                                       
      DEC       Digital Equipment Corporation                                 
      DSN       Deep Space Network                                            
      FEA       Front End Assembly                                            
      GSFC      Goddard Space Flight Center                                   
      IEEE      Institute of Electrical and Electronic Engineers              
      IAU       International Astronomical Union                              
      JPL       Jet Propulsion Laboratory                                     
      J2000     IAU Official Time Epoch                                       
      K         Degrees Kelvin                                                
      kB        kilobytes                                                     
      km        Kilometers                                                    
      LP        Lunar Prospector (mission or spacecraft)                      
      MGN       Magellan (project or spacecraft)                              
      MGS       Mars Global Surveyor                                          
      MO        Mars Observer                                                 
      NAIF      Navigation and Ancillary Information Facility                 
      NASA      National Aeronautics and Space Administration                 
      NAV       Navigation Subsystem/Team                                     
      ODL       Object Definition Language (PDS)                              
      PDS       Planetary Data System                                         
      RS        Radio Science                                                 
      RSDMAP    Radio Science Digital Map Product                             
      RSS       Radio Science Subsystem                                       
      RST       Radio Science Team                                            
      SCET      Space Craft Event Time                                        
      SHADR     Spherical Harmonic ASCII Data Record                          
      SHBDR     Spherical Harmonic Binary Data Record                         
      SHM       Spherical Harmonic Model                                      
      SIS       Software Interface Specification                              
      SOPC      Science Operations Planning Computer                          
      SPARC     Sun Scaleable Processor Architecture                          
      SPK       Spacecraft and Planet Kernel Format, from NAIF                
      TBD       To Be Determined                                              
      TDB       Temps Dynamique Barycentrique - IAU Standard Ephemeris        
                         Time                                                 
      TES       Thermal Emission Spectrometer                                 
      UTC       Universal Time Coordinated                                    
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
1.  General Description                                                       
                                                                              
1.1.   Overview                                                               
                                                                              
      This Software Interface Specification (SIS) describes Radio             
Science Digital Map (RSDMAP) files.  The RSDMAP product was designed          
for geoid, isostatic anomaly, Bouguer anomaly, or other digital maps          
derived primarily from Radio Science data [1].  Use of the RSDMAP format      
is not limited to Radio Science data, however.                                
                                                                              
1.2.   Scope                                                                  
                                                                              
      The format and content specifications in this SIS apply to all          
phases of a project for which RSDMAP products are produced.                   
                                                                              
      The RSDMAP product was defined initially for free air gravity           
maps derived from Magellan (MGN) and Mars Observer (MO) radio tracking        
data, but the format is more generally useful.  It has been adapted           
here for Mars Global Surveyor (MGS) and Lunar Prospector (LP) radio           
data with options for MGS Thermal Emission Spectrometer (TES) data.           
                                                                              
      The Magellan, Mars Observer, and Mars Global Surveyor Missions          
were (are) managed by the Jet Propulsion Laboratory (JPL) for the             
National Aeronautics and Space Administration (NASA).  Lunar                  
Prospector is managed by the Ames Research Center (ARC) for NASA.             
                                                                              
1.3.   Applicable Documents                                                   
                                                                              
[1] Tyler, G.L., G. Balmino, D.P. Hinson, W.L. Sjogren, D.E. Smith,           
     R. Woo, S.W. Asmar, M.J. Connally, C.L. Hamilton, and R.A.               
     Simpson, Radio Science Investigations with Mars Observer, J.             
     Geophys. Res., 97, 7759-7779, 1992.                                      
                                                                              
[2] MGN 630-7, Rev. D, Magellan Planetary Constants and Models, D.T.          
     Lyons, Mission Design, Jet Propulsion Laboratory, 9 January 1991.        
                                                                              
[3] MO 642-321, Mars Observer Planetary Constants and Models, JPL             
     D-3444, November 1990.                                                   
                                                                              
[4] D-7116, Rev. D, Planetary Science Data Dictionary Document,               
     Jet Propulsion Laboratory, 15 June 1996.                                 
                                                                              
[5] D-7669 Part 2, Planetary Data System Standards Reference, PDS             
     Version 3.2, Jet Propulsion Laboratory, 24 July 1995.                    
                                                                              
1.4.   System Siting                                                          
                                                                              
1.4.1.   Interface Location and Medium                                        
                                                                              
      RSDMAP files are created at the institution conducting the              
science analysis.  RSDMAP files are electronic files.                         
                                                                              
1.4.2.   Data Sources, Transfer Methods, and Destinations                     
                                                                              
      RSDMAP files are created from radio tracking, vertical sounding,        
in situ, and/or other measurements at the institution conducting the          
scientific data analysis.  They are transferred to and deposited in a         
data system specified by the managing institution.                            
                                                                              
      Mars Global Surveyor files will be delivered to users via               
electronic networks and on compact-disc write-once volumes (CD-WO).           
                                                                              
1.4.3.   Generation Method and Frequency                                      
                                                                              
      RSDMAP files are developed separately at each institution               
conducting scientific analyses on raw data.  Each digital map meets           
criteria specified by the investigators conducting the analysis.              
Each digital map typically requires data from a large number of               
latitudes and longitudes, so that RSDMAP files will be issued                 
infrequently and on schedules which cannot be predicted.                      
                                                                              
                                                                              
1.5.   Assumptions and Constraints                                            
                                                                              
1.5.1.   Usage Constraints                                                    
                                                                              
      None.                                                                   
                                                                              
1.5.2.   Priority Phasing Constraints                                         
                                                                              
      None.                                                                   
                                                                              
1.5.3.   Explicit and Derived Constraints                                     
                                                                              
      None.                                                                   
                                                                              
1.5.4.   Documentation Conventions                                            
                                                                              
1.5.4.1.   Data Format Descriptions                                           
                                                                              
      The reference data unit is the byte. Data may be stored in              
fields with various sizes and formats, viz. one-, two-, and four-byte         
binary integers, four- and eight-byte binary floating-point numbers,          
and character strings. Data are identified throughout this document as        
                                                                              
          char         8 bits      character                                  
          uchar        8 bits      integer                                    
          short       16 bits      integer                                    
          long        32 bits      integer                                    
          float       32 bits      floating point (sign, exponent, and        
                                      mantissa)                               
          double      64 bits      floating point (sign, exponent, and        
                                      mantissa)                               
          u (prefix)               unsigned (as with ulong  for               
                                      unsigned 32-bit integer)                
          other                    special data structures such as            
                                      time, date, etc. which are              
                                      described within this document          
                                                                              
The detailed formats of the numeric fields are defined in Appendix A.         
                                                                              
      If a field is described as containing n bytes of ASCII character        
string data, this implies that the leftmost (lowest numbered) byte            
contains the first character, the next lowest byte contains the second        
character, and so forth.                                                      
                                                                              
      An array of n elements is written as array[n]; the first element        
is array[0], and the last is array[n-1]. Array[n][m] describes an n by        
m element array, with first element array[0][0], second element               
array[0][1], and so forth.                                                    
                                                                              
1.5.4.2.   Time Standards                                                     
                                                                              
      RSDMAP files use the January 1.5, 2000 epoch as the standard            
time.  Within the data files, all times are reported in Universal             
Coordinated Time (UTC) as strings of 23 ASCII characters.  The time           
format is  "YYYY-MM-DDThh:mm:ss.fff", where "-", "T", ":", and "." are        
fixed delimiters; "YYYY" is the year "19nn" or "20nn"; "MM" is a two-         
digit month of year; "DD" is a two-digit day of month; "T" separates          
the date and time segments of the string; "hh" is hour of day; "mm" is        
the minutes of hour (00-59); "ss" is the seconds of hour (00-59); and         
"fff" is in milliseconds.                                                     
                                                                              
      The date format is "YYYY-MM-DD", where the components are               
defined as above.                                                             
                                                                              
1.5.4.3.   Coordinate Systems                                                 
                                                                              
      Coordinate systems for RSDMAP products are specified in the             
IMAGE_MAP_PROJECTION definition in the PDS label (see Section 4.2.3).         
These may be described more fully in other documents -- e.g. [2,3].           
                                                                              
1.5.4.4.   Limits of This Document                                            
                                                                              
      This document applies only to RSDMAP data files.                        
                                                                              
1.5.4.5.   Typographic Conventions                                            
                                                                              
      This document has been formatted for simple electronic file             
transfer and display.  Line lengths are limited to 80 ASCII                   
characters, including line delimiters.  No special fonts or structures        
are included within the file.  Constant width characters are assumed          
for display.                                                                  
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
2.  Interface Characteristics                                                 
                                                                              
2.1.   Hardware Characteristics and Limitations                               
                                                                              
2.1.1.   Special Equipment and Device Interfaces                              
                                                                              
      Users of the RSDMAP product must have access to the data system         
(or to backup media) on which RSDMAP files are stored.                        
                                                                              
2.1.2.   Special Setup Requirements                                           
                                                                              
      None.                                                                   
                                                                              
2.2.   Volume and Size                                                        
                                                                              
      RSDMAP products have variable length depending on the resolution        
of the map, the number of quantities represented in the image, and the        
format of the individual data points.  A rectangular map of resolution        
1 degree in both latitude and longitude with a single parameter given         
as a double precision floating point number requires about 520 kB             
total.  The same map in one-byte integers would require about 65 kB.          
                                                                              
2.3.   Labeling and Identification                                            
                                                                              
      Each file has a name which describes its contents. The name             
includes the following structure which uniquely identifies it among           
RSDMAP products:                                                              
                                                                              
                               GTnnnnvv.IMG                                   
                                                                              
where                                                                         
                                                                              
      "G"          denotes the generating institution                         
                      "A"      for Arizona State University                   
                      "J"      for the Jet Propulsion Laboratory              
                      "G"      for Goddard Space Flight Center                
                      "C"      for Centre National d'Etudes Spatiales         
                      "S"      for Stanford University                        
                                                                              
      "T"          indicates the type of data represented                     
                      "G"      for free air gravity field                     
                      "O"      for geoid                                      
                      "B"      for Bouguer anomaly                            
                      "I"      for isostatic anomaly                          
                      "T"      for topography                                 
                      "M"      for magnetic field                             
                                                                              
      "nnnnvv"     is a 6-character modifier specified by the data            
                     producer.  Among other things, this modifier may be      
                     used to indicate the target body, whether the SHBDR      
                     contains primary data values as specified by "T" or      
                     uncertainties/errors, and/or the version number.         
                                                                              
      Each RSDMAP file is accompanied by a detached PDS label; that label is  
a file in its own right with name  GTnnnnvv.LBL                               
                                                                              
                                                                              
                                                                              
2.4.   Interface Medium Characteristics                                       
                                                                              
      RSDMAP products are electronic files.                                   
                                                                              
2.5.   Failure Protection, Detection, and Recovery Procedures                 
                                                                              
      None.                                                                   
                                                                              
2.6.   End-of-File Conventions                                                
                                                                              
      End of file labeling complies with standards of the data system         
or medium on which they are stored.                                           
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
3.   Access                                                                   
                                                                              
3.1.   Programs Using the Interface                                           
                                                                              
      Data contained in RSDMAP files will be accessed by programs at          
the home institutions of science investigators.  Those programs               
cannot be identified here.                                                    
                                                                              
3.2.   Synchronization Considerations                                         
                                                                              
3.2.1.   Timing and Sequencing Considerations                                 
                                                                              
      N/A                                                                     
                                                                              
3.2.2.   Effective Duration                                                   
                                                                              
      N/A                                                                     
                                                                              
3.2.3.   Priority Interrupts                                                  
                                                                              
      None.                                                                   
                                                                              
3.3.   Input/Output Protocols, Calling Sequences                              
                                                                              
      None.                                                                   
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
4.   Detailed Interface Specifications                                        
                                                                              
4.1.   Structure and Organization Overview                                    
                                                                              
      The RSDMAP is a file generated by software at the institution           
conducting scientific data analysis.  Each RSDMAP file is                     
accompanied by a detached PDS label.                                          
                                                                              
4.2. Detached PDS Label                                                       
                                                                              
      The detached PDS label has three parts -- a header, an IMAGE            
object definition, and an IMAGE_MAP_PROJECTION definition.  The header        
contains information about the origin of the file and its general             
characteristics such as record type and size.  The IMAGE object definition    
contains information about the image -- lines, pixels, scaling of pixel       
values, etc.  The IMAGE_MAP_PROJECTION definition describes how one should    
display the image.                                                            
                                                                              
      Each detached PDS label is constructed of ASCII records;                
each record contains exactly 80 characters.  The last two characters          
in each record are the carriage-return (ASCII 13) and line-feed               
(ASCII 10) characters.                                                        
                                                                              
      An example of a complete label is given in Appendix B.                  
                                                                              
4.2.1 Label Header                                                            
                                                                              
      The structure of the label file header is illustrated in                
Figure 4-2-1.  Keyword definitions are given below.                           
                                                                              
|====================================================================|        
|                                                                    |        
|                 Figure 4-2-1  RSDMAP Label Header                  |        
|                                                                    |        
|====================================================================|        
|                                                                    |        
|  PDS_VERSION_ID = PDS3                                             |        
|  RECORD_TYPE = FIXED_LENGTH                                        |        
|  RECORD_BYTES = nnn                                                |        
|  FILE_RECORDS = nnn                                                |        
|  ^IMAGE = "GTnnnnvv.IMG"                                           |        
|  INSTRUMENT_HOST_NAME = "cccccccccccccccccccc"                     |        
|  TARGET_NAME = "cccc"                                              |        
|  INSTRUMENT_NAME = "ccccccccccccccccccccccc"                       |        
|  DATA_SET_ID = "ccccccccccccccccccccccc"                           |        
|  ORIGINAL_PRODUCT_ID = "ccccccccccccccc"                           |        
|  PRODUCT_ID = "GTnnnnvv.IMG"                                       |        
|  PRODUCT_RELEASE_DATE = YYYY-MM-DD                                 |        
|  DESCRIPTION = "cccccccccccccccccc"                                |        
|  START_ORBIT_NUMBER = nnnn                                         |        
|  STOP_ORBIT_NUMBER = nnnn                                          |        
|  START_TIME = YYYY-MM-DDThh:mm:ss.fff                              |        
|  STOP_TIME = YYYY-MM-DDThh:mm:ss.fff                               |        
|  SOFTWARE_NAME = "ccccccc;Vn.m"                                    |        
|  PRODUCT_CREATION_TIME = YYYY-MM-DDThh:mm:ss.fff                   |        
|  PRODUCER_ID = "ccccccc"                                           |        
|                                                                    |        
|====================================================================|        
                                                                              
PDS_VERSION_ID =          The version of the Planetary Data System for        
                          which these data have been prepared (set to         
                          PDS3 by agreement between the Mars Global           
                          Surveyor Project and PDS).                          
                                                                              
RECORD_TYPE =             The type of record.  Set to  "FIXED_LENGTH"         
                          to indicate that all logical records have           
                          the same length.                                    
                                                                              
RECORD_BYTES =            The number of bytes per (fixed-length)              
                          record.                                             
                                                                              
FILE_RECORDS =            The number of records in the RSDMAP file;           
                          instance dependent.                                 
                                                                              
^IMAGE =                  File name of the RSDMAP file in the form            
                          "GTnnnnvv.IMG", where the structure is              
                          explained in Section 2.3.                           
                                                                              
INSTRUMENT_HOST_NAME =    Name of the spacecraft; acceptable names            
                          include "MARS GLOBAL SURVEYOR" and "LUNAR           
                          PROSPECTOR".                                        
                                                                              
TARGET_NAME =             A character string which identifies the             
                          target body.  For MGS RSDMAP files, the             
                          character string "MARS".  For Lunar                 
                          Prospector RSDMAP files, the character              
                          string "MOON".                                      
                                                                              
INSTRUMENT_NAME =         Name of the instrument; set to "RADIO               
                          SCIENCE SUBSYSTEM" for products generated           
                          from radio science data, or to other                
                          instrument names as appropriate.                    
                                                                              
DATA_SET_ID =             Identifier for the data set of which this           
                          RSDMAP product is a member.  Set to "MGS-M-         
                          RSS-5-SDP-Vn.m" for Mars Global Surveyor            
                          RSDMAP products, where "Vn.m" indicates the         
                          version number of the data set.  Set to other       
                          data set identifiers as appropriate.                
                                                                              
ORIGINAL_PRODUCT_ID =      Optional.  An identifier for the product           
                           provided by the producer.  Generally a             
                           file name, different from PRODUCT_ID, which        
                           would be recognized at the producer's              
                           institution.                                       
                                                                              
PRODUCT_ID =              A unique identifier for the product within          
                          the collection identified by DATA_SET_ID.           
                          Usually the same as the value for ^IMAGE.           
                          The naming convention is defined in                 
                          Section 2.3.                                        
                                                                              
PRODUCT_RELEASE_DATE =    The date on which the product was released          
                          to the Planetary Data System; entered in the        
                          format "YYYY-MM-DD", where components are           
                          defined in Section 1.5.4.2.                         
                                                                              
DESCRIPTION =             A short description of the RSDMAP product.          
                                                                              
START_ORBIT_NUMBER =      Optional.  The first orbit represented in           
                          the RSDMAP product.  An integer.                    
                                                                              
STOP_ORBIT_NUMBER =       Optional.  The last orbit represented in            
                          the RSDMAP product.  An integer.                    
                                                                              
START_TIME =              The Earth Receive Time at which the first           
                          sample was acquired, expressed in the format        
                          "YYYY-MM-DDThh:mm:ss.fff"  where the                
                          components are defined in Section 1.5.4.2.          
                                                                              
STOP_TIME =               The Earth Receive Time at which the last            
                          sample was acquired, expressed in the format        
                          "YYYY-MM-DDThh:mm:ss.fff"  where the                
                          components are defined in Section 1.5.4.2.          
                                                                              
SOFTWARE_NAME =           The name and version number of the program          
                          creating this RSDMAP file; expressed as a           
                          character string in the format                      
                          "PROGRAM_NAME;n.mm" where "PROGRAM_NAME" is         
                          the name of the software and "n.mm" is the          
                          version number.                                     
                                                                              
PRODUCT_CREATION_TIME =   The time at which this RSDMAP was created;          
                          expressed in the format "YYYY-MM-                   
                          DDThh:mm:ss.fff"  where the components are          
                          defined in Section 1.5.4.2.                         
                                                                              
PRODUCER_ID =             The entity responsible for creation of the          
                          RSDMAP product; for products generated by the       
                          Mars Global Surveyor Radio Science Team, set        
                          to "MGS RST".                                       
                                                                              
|====================================================================|        
|                                                                    |        
|            Figure 4-2-2  RSDMAP Image Object Definition            |        
|                                                                    |        
|====================================================================|        
|                                                                    |        
|  OBJECT               = IMAGE                                      |        
|    LINES                      = nnnn                               |        
|    LINE_SAMPLES               = nnnn                               |        
|    SAMPLE_TYPE                = nnnn                               |        
|    SAMPLE_BITS                = nnnn                               |        
|    OFFSET                     = nnn.ff                             |        
|    SCALING_FACTOR             = nnn.ff                             |        
|    DESCRIPTION                = "cccccccccccccc"                   |        
|  END_OBJECT           = IMAGE                                      |        
|                                                                    |        
|====================================================================|        
                                                                              
                                                                              
4.2.2.  Image Object Definition                                               
                                                                              
      The Image Object Definition in the label completely describes           
the accompanying Digital Map.  It immediately follows the label               
header and has the format shown in Figure 4-2-2.                              
                                                                              
      Keywords are defined in [4].  There is no requirement within            
this document that there be any relationship among RECORD_BYTES,              
LINE_SAMPLES, and SAMPLE_BITS other than that the number of bytes             
in an image line be an integral multiple of RECORD_BYTES (Section             
4.2.1).  It is strongly recommended, however, that producers of               
RSDMAP files make the line lengths identically equal to RECORD_BYTES          
to ensure maximum compatibility with existing image processing                
software.  For compatibility, producers are also encouraged to use            
8- or 16-bit integer pixels rather than longer formats.                       
                                                                              
4.2.3. Image Map Projection Object Definition                                 
                                                                              
      The Image Map Projection Object Definition specifies the map            
projection for an RSDMAP product.  It is used for interpretation of           
the RSDMAP data; it is not required for understanding the structure           
of the file.  It immediately follows the Image Object Definition and          
has the form shown in Figure 4-2-3.                                           
                                                                              
|====================================================================|        
|                                                                    |        
|        Figure 4-2-3  RSDMAP Image Map Projection Definition        |        
|                                                                    |        
|====================================================================|        
|                                                                    |        
|  OBJECT               = IMAGE_MAP_PROJECTION                       |        
|    ^DATA_SET_MAP_PROJECTION     = "cccccccc.CAT"                   |        
|    COORDINATE_SYSTEM_NAME       = ccccccccccccc                    |        
|    COORDINATE_SYSTEM_TYPE       = ccccccccccccc                    |        
|    MAP_PROJECTION_TYPE          = "ccccccccccc"                    |        
|    A_AXIS_RADIUS                = nnn.ff <unit>                    |        
|    B_AXIS_RADIUS                = nnn.ff <unit>                    |        
|    C_AXIS_RADIUS                = nnn.ff <unit>                    |        
|    FIRST_STANDARD_PARALLEL      = "N/A"                            |        
|    SECOND_STANDARD_PARALLEL     = "N/A"                            |        
|    POSITIVE_LONGITUDE_DIRECTION = ccccccccccccc                    |        
|    CENTER_LATITUDE              = nnn.ff <unit>                    |        
|    CENTER_LONGITUDE             = nnn.ff <unit>                    |        
|    REFERENCE_LATITUDE           = "N/A"                            |        
|    REFERENCE_LONGITUDE          = "N/A"                            |        
|    LINE_FIRST_PIXEL             = nnn                              |        
|    LINE_LAST_PIXEL              = nnn                              |        
|    SAMPLE_FIRST_PIXEL           = nnn                              |        
|    SAMPLE_LAST_PIXEL            = nnn                              |        
|    MAP_PROJECTION_ROTATION      = nnn.ff <unit>                    |        
|    MAP_RESOLUTION               = nnn.ff <unit>                    |        
|    MAP_SCALE                    = "N/A"                            |        
|    MAXIMUM_LATITUDE             = nnn.ff <unit>                    |        
|    MINIMUM_LATITUDE             = nnn.ff <unit>                    |        
|    EASTERNMOST_LONGITUDE        = nnn.ff <unit>                    |        
|    WESTERNMOST_LONGITUDE        = nnn.ff <unit>                    |        
|    LINE_PROJECTION_OFFSET       = nnn.ff                           |        
|    SAMPLE_PROJECTION_OFFSET     = nnn                              |        
|  END_OBJECT           = IMAGE_MAP_PROJECTION                       |        
|                                                                    |        
|====================================================================|        
                                                                              
      Keywords are defined, and standard values are given, in [4].            
For Mars Global Surveyor Radio Science products, the following are            
required:                                                                     
                                                                              
         COORDINATE_SYSTEM_NAME       = PLANETOCENTRIC                        
         COORDINATE_SYSTEM_TYPE       = "BODY-FIXED ROTATING"                 
         POSITIVE_LONGITUDE_DIRECTION = WEST                                  
                                                                              
DSMP.CAT  is a file stored elsewhere (in the CATALOG directory on a           
CD-WO volume); it specifies the map projection more explicitly.               
                                                                              
4.3   Data File                                                               
                                                                              
      The data file is the Image Object, defined in 4.2.2 and                 
presumed to contain the digital map.                                          
                                                                              
      Each map comprises LINES rows of LINE_SAMPLES pixels; each              
pixel occupies SAMPLE_BITS bits.                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
5. Support Staff and Cognizant Personnel                                      
                                                                              
                                                                              
      The following persons may be contacted for information.                 
                                                                              
                                                                              
      Mars Global Surveyor Radio Science Team:                                
                                                                              
            Richard A. Simpson                                                
            Durand Building - Room 232                                        
            Center for Radar Astronomy                                        
            Stanford University                                               
            Stanford, CA  94305-9515                                          
                                                                              
            Phone:  650-723-3525                                              
            FAX:    650-723-9251                                              
            Electronic mail:  rsimpson@magellan.stanford.edu                  
                                                                              
                                                                              
      Planetary Data System:                                                  
                                                                              
            PDS Operator                                                      
            Planetary Data System                                             
            MS 202-101                                                        
            Jet Propulsion Laboratory                                         
            4800 Oak Grove Drive                                              
            Pasadena, CA  91109-8099                                          
                                                                              
            Phone:  818-354-4321                                              
            Electronic Mail:  pds_operator@jpl.nasa.gov                       
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
Appendix A. Binary Data Format                                                
                                                                              
A.1. IEEE Integer Fields                                                      
                                                                              
 0       7                                      1-byte (char; uchar)          
 ---------                                                                    
|   [0]   |                                                                   
 ---------                                                                    
                                                                              
 0                15                            2-byte (short; ushort)        
 --------- ---------                                                          
|   [0]   |   [1]   |                                                         
 --------- ---------                                                          
                                                                              
 0                                    31        4-byte (long; ulong)          
 --------- --------- --------- ---------                                      
|   [0]   |   [1]   |   [2]   |   [3]   |                                     
 --------- --------- --------- ---------                                      
                                                                              
                                                                              
IEEE binary integers are stored in one, two, or four consecutive 8-bit        
bytes. Unsigned integers uchar, ushort, ulong, which always represent         
positive values, contain 8, 16, or 32 binary bits, respectively. As           
illustrated above, the significance increases from the rightmost bit          
to the leftmost (bit 0). Signed integers (char, short, long) are              
stored in the same way, except that negative values are formed by             
taking the corresponding positive value, complementing each bit, then         
adding unity -- known as "two's complement" format. As a consequence,         
a negative value always has bit 0 set "on". Integers are written              
externally in increasing byte-number order, i.e. [0], [1], etc., so           
that more significant bits always precede less significant ones. For          
example, the short value -2 is stored as a pair of bytes valued  0xff,        
0xfe.                                                                         
                                                                              
A.2. IEEE Floating-Point Fields                                               
                                                                              
 0 1       8 9                        31               4-byte (float)         
 --------- --------- --------- ---------                                      
| |  [0]  | |  [1]  |   [2]   |   [3]   |                                     
 --------- --------- --------- ---------                                      
                                                                              
 0 1       8 9                        31               8-byte (double)        
 --------- --------- --------- ---------                                      
| |  [0]  | |  [1]  |   [2]   |   [3]   |                                     
 --------- --------- --------- ---------                                      
           32                                   63                            
           --------- --------- --------- ---------                            
          |   [4]   |   [5]   |   [6]   |   [7]   |                           
           --------- --------- --------- ---------                            
                                                                              
                                                                              
IEEE single- (double-) precision floating point numbers (known to IEEE        
enthusiasts as E-type floating-point formats, respectively) are stored        
in four (eight) consecutive bytes. Bit number 0 contains a sign               
indicator, S. Bits 1 through 8 (11) contain a binary exponent, E. The         
significance increases from bit 8 (11) through bit 1. Bits 9 (12)             
through 31 (63) contain a mantissa M, a 23-bit (52-bit) binary                
fraction whose binary point lies immediately to the left of bit 9             
(12). The significance increases from bit 31 (63) through bit 9 (11).         
The value of the  single-precision field is given by                          
                                                                              
                             S  E-127                                         
                         (-1) *2     *(1+M)                                   
                                                                              
The value of the  double-precision field is given by                          
                                                                              
                             S  E-1023                                        
                         (-1) *2      *(1+M)                                  
                                                                              
The numbers are stored externally in increasing byte-number order,            
i.e. [0], [1], etc. For example, the maximum single-precision float           
value +3.40282347E+38 is stored as four bytes valued 0x7f, 0x7f, 0xff,        
0xff.                                                                         
                                                                              
Special single-precision float values are represented as +Infinity            
(0x7f800000), -Infinity (0xff800000), quiet NaN (not a number)                
(0xffffffff), and signaling NaN (0x7f800001).                                 
                                                                              
A.3. VAX Integer Fields                                                       
                                                                              
 0       7                                      1-byte (char; uchar)          
 ---------                                                                    
|   [0]   |                                                                   
 ---------                                                                    
                                                                              
 0                15                            2-byte (short; ushort)        
 --------- ---------                                                          
|   [1]   |   [0]   |                                                         
 --------- ---------                                                          
                                                                              
 0                                    31        4-byte (long; ulong)          
 --------- --------- --------- ---------                                      
|   [3]   |   [2]   |   [1]   |   [0]   |                                     
 --------- --------- --------- ---------                                      
                                                                              
      VAX binary integers are stored in one, two, or four consecutive         
8-bit bytes. Unsigned integers uchar, ushort, and ulong (which always         
represent positive values) contain 8, 16, or 32 binary bits,                  
respectively.  As illustrated above, the significance increases from          
the rightmost bit to the leftmost (bit 0).  Signed integers (char,            
short, long) are stored in the same way, except that negative values          
are formed by taking the corresponding positive value, complementing          
each bit, then adding unity -- known as "two's complement" format. As         
a consequence, a negative value always has bit 0 set or "on."                 
Integers are written externally in increasing byte-number order, i.e.         
[0], [1], etc., so that less significant bits always precede more             
significant ones.  For example, the short value -2 is stored as a pair        
of bytes valued 0xfe, 0xff.  (This section has been adapted from a            
description by P.G. Ford in the Magellan ARCDR SIS).                          
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
A.4. VAX Floating-Point Fields                                                
                                                                              
 0 1       8 9                        31               4-byte (float)         
 --------- --------- --------- ---------                                      
| |  [1]  | |  [0]  |   [3]   |   [2]   |                                     
 --------- --------- --------- ---------                                      
                                                                              
 0 1       8 9                        31               8-byte (double)        
 --------- --------- --------- ---------                                      
| |  [1]  | |  [0]  |   [3]   |   [2]   |                                     
 --------- --------- --------- ---------                                      
           32                                   63                            
           --------- --------- --------- ---------                            
          |   [5]   |   [4]   |   [7]   |   [6]   |                           
           --------- --------- --------- ---------                            
                                                                              
      VAX single- (double-) precision floating point numbers (known to        
VAX enthusiasts as F-type and D-type floating-point formats,                  
respectively) are stored in four (eight) consecutive bytes.  Bit              
number 0 contains a sign indicator, S.  Bits 1 through 8 contain a            
binary exponent, E.  The significance increases from bit 8 through bit        
1.  Bits 9 through 31 (63) contain a mantissa M, a 23-bit (55-bit)            
binary fraction whose binary point lies immediately to the left of bit        
9.  The significance increases from bit 31 (63) through bit 9.  The           
value of the field is given by                                                
                                                                              
                              S  E-129                                        
                          (-1) *2     *(1+M)                                  
                                                                              
The numbers are stored externally in increasing byte-number order,            
i.e. [0], [1], etc.  For example, the float value +1.0 is stored as           
four bytes valued 0x80, 0x40, 0x00, 0x00.  (This section has been             
adapted from a description by P.G. Ford in the Magellan ARCDR SIS).           
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
                                                                              
Appendix B.   Example RSDMAP Label and Data Object                            
                                                                              
B.1  Example Label                                                            
                                                                              
PDS_VERSION_ID               = PDS3                                           
RECORD_TYPE                  = FIXED_LENGTH                                   
RECORD_BYTES                 = 2880                                           
FILE_RECORDS                 = 180                                            
^IMAGE                       = "JGM50C01.IMG"                                 
INSTRUMENT_HOST_NAME         = "MARS GLOBAL SURVEYOR"                         
TARGET_NAME                  = "MARS"                                         
INSTRUMENT_NAME              = "RADIO SCIENCE SUBSYSTEM"                      
DATA_SET_ID                  = "MGS-M-RSS-5-SDP-V1.0"                         
ORIGINAL_PRODUCT_ID          = "MARS50C.A01"                                  
PRODUCT_ID                   = "JGM50C01.IMG"                                 
PRODUCT_RELEASE_DATE         = 1998-01-15                                     
DESCRIPTION                  = "This file contains a digital map of Mars      
 gravity accelerations derived from radio tracking of the Mariner 9 and Viking
 Orbiter spacecraft.  The map is vertical gravity in milligals at the surface 
 referenced to a sphere of 3394.2 km radius.  START_ORBIT_NUMBER,             
 STOP_ORBIT_NUMBER, START_TIME, and STOP_TIME below do not have values because
 there are no Mars Global Surveyor data included in the model.  This is       
 considered to be the baseline (pre-MGS) Mars model for the JPL Gravity       
 Science Team; it was produced under the direction of W.L. Sjogren."          
                                                                              
START_ORBIT_NUMBER           = "N/A"                                          
STOP_ORBIT_NUMBER            = "N/A"                                          
START_TIME                   = "N/A"                                          
STOP_TIME                    = "N/A"                                          
SOFTWARE_NAME                = "GRVMAP;V1.0"                                  
PRODUCT_CREATION_TIME        = 1995-02-17T12:34:56.789                        
PRODUCER_ID                  = "MARS GRAVSCI TEAM"                            
                                                                              
/* Structure Objects */                                                       
                                                                              
OBJECT                       = IMAGE                                          
  LINES                        = 180                                          
  LINE_SAMPLES                 = 360                                          
  SAMPLE_TYPE                  = "IEEE REAL"                                  
  SAMPLE_BITS                  = 64                                           
  OFFSET                       = 0.0E+00                                      
  SCALING_FACTOR               = 1.0E+00                                      
  DESCRIPTION                  = "The Digital Map contains values of vertical 
   gravity.  The values in milligals can be obtained by multiplying the       
   sample in the map by SCALING_FACTOR and then adding OFFSET. "              
END_OBJECT                   = IMAGE                                          
                                                                              
OBJECT                       = IMAGE_MAP_PROJECTION                           
  ^DATA_SET_MAP_PROJECTION     = "DSMAP2.CAT"                                 
  COORDINATE_SYSTEM_TYPE       = "BODY-FIXED ROTATING"                        
  COORDINATE_SYSTEM_NAME       = PLANETOCENTRIC                               
  MAP_PROJECTION_TYPE          = "SIMPLE CYLINDRICAL"                         
  A_AXIS_RADIUS                = 3394.20 <KM>                                 
  B_AXIS_RADIUS                = 3394.20 <KM>                                 
  C_AXIS_RADIUS                = 3394.20 <KM>                                 
  FIRST_STANDARD_PARALLEL      = "N/A"                                        
  SECOND_STANDARD_PARALLEL     = "N/A"                                        
  POSITIVE_LONGITUDE_DIRECTION = "EAST"                                       
  CENTER_LATITUDE              = 0.0 <DEGREES>                                
  CENTER_LONGITUDE             = 0.0 <DEGREES>                                
  REFERENCE_LATITUDE           = 0.0 <DEGREES>                                
  REFERENCE_LONGITUDE          = 0.0 <DEGREES>                                
  LINE_FIRST_PIXEL             = 1                                            
  LINE_LAST_PIXEL              = 180                                          
  SAMPLE_FIRST_PIXEL           = 1                                            
  SAMPLE_LAST_PIXEL            = 360                                          
  MAP_PROJECTION_ROTATION      = 0.0 <DEGREES>                                
  MAP_RESOLUTION               = 1.0E+00                                      
  MAP_SCALE                    = "N/A"                                        
  MAXIMUM_LATITUDE             = 89.5 <DEGREES>                               
  MINIMUM_LATITUDE             = -89.5 <DEGREES>                              
  EASTERNMOST_LONGITUDE        = 179.5 <DEGREES>                              
  WESTERNMOST_LONGITUDE        = -179.5 <DEGREES>                             
  LINE_PROJECTION_OFFSET       = 89.5                                         
  SAMPLE_PROJECTION_OFFSET     = 179.5                                        
END_OBJECT                   = IMAGE_MAP_PROJECTION                           
                                                                              
END                                                                           
                                                                              
                                                                              
                                                                              
                                                                              
B.2      Example Data Object                                                  
                                                                              
      The example below shows part of a data object corresponding to the label
shown in B.1.  The data object is shown in hexadecimal format.  The first     
record, part of the second record, and part of the last record are shown.  The
left column gives the number of the first byte in each row, starting with 0.  
                                                                              
               0000000 4057 fa3d 70a3 d70a 4057 fae1 47ae 147b                
               0000016 4057 fb85 1eb8 51ec 4057 fc28 f5c2 8f5c                
               0000032 4057 fccc cccc cccd 4057 fe14 7ae1 47ae                
               0000048 4057 fe14 7ae1 47ae 4057 feb8 51eb 851f                
               0000064 4057 ff5c 28f5 c28f 4058 0000 0000 0000                
               0000080 4058 00a3 d70a 3d71 4058 0147 ae14 7ae1                
               0000096 4058 01eb 851e b852 4058 01eb 851e b852                
               0000112 4058 028f 5c28 f5c3 4058 028f 5c28 f5c3                
               0000128 4058 0333 3333 3333 4058 03d7 0a3d 70a4                
               0000144 4058 03d7 0a3d 70a4 4058 03d7 0a3d 70a4                
               0000160 4058 047a e147 ae14 4058 047a e147 ae14                
               0000176 4058 047a e147 ae14 4058 051e b851 eb85                
               0000192 4058 051e b851 eb85 4058 051e b851 eb85                
               *                                                              
               0000256 4058 047a e147 ae14 4058 047a e147 ae14                
               *                                                              
               0000288 4058 03d7 0a3d 70a4 4058 03d7 0a3d 70a4                
               0000304 4058 0333 3333 3333 4058 0333 3333 3333                
               0000320 4058 028f 5c28 f5c3 4058 028f 5c28 f5c3                
               0000336 4058 01eb 851e b852 4058 0147 ae14 7ae1                
               0000352 4058 00a3 d70a 3d71 4058 00a3 d70a 3d71                
               0000368 4058 0000 0000 0000 4057 ff5c 28f5 c28f                
               0000384 4057 feb8 51eb 851f 4057 fe14 7ae1 47ae                
               0000400 4057 fd70 a3d7 0a3d 4057 fccc cccc cccd                
               0000416 4057 fc28 f5c2 8f5c 4057 fae1 47ae 147b                
               0000432 4057 fa3d 70a3 d70a 4057 f999 9999 999a                
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               0001296 4057 48f5 c28f 5c29 4057 47ae 147a e148                
               0001312 4057 45c2 8f5c 28f6 4057 447a e147 ae14                
               0001328 4057 4333 3333 3333 4057 41eb 851e b852                
               0001344 4057 4000 0000 0000 4057 3eb8 51eb 851f                
               0001360 4057 3d70 a3d7 0a3d 4057 3c28 f5c2 8f5c                
               0001376 4057 3ae1 47ae 147b 4057 3999 9999 999a                
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               0001408 4057 3666 6666 6666 4057 351e b851 eb85                
               0001424 4057 347a e147 ae14 4057 3333 3333 3333                
               0001440 4057 328f 5c28 f5c3 4057 3147 ae14 7ae1                
               0001456 4057 30a3 d70a 3d71 4057 2f5c 28f5 c28f                
               0001472 4057 2eb8 51eb 851f 4057 2e14 7ae1 47ae                
               0001488 4057 2d70 a3d7 0a3d 4057 2c28 f5c2 8f5c                
               0001504 4057 2b85 1eb8 51ec 4057 2ae1 47ae 147b                
               0001520 4057 2a3d 70a3 d70a 4057 2999 9999 999a                
               0001536 4057 2999 9999 999a 4057 28f5 c28f 5c29                
               0001552 4057 2851 eb85 1eb8 4057 27ae 147a e148                
               0001568 4057 27ae 147a e148 4057 270a 3d70 a3d7                
               0001584 4057 270a 3d70 a3d7 4057 2666 6666 6666                
               0001600 4057 2666 6666 6666 4057 2666 6666 6666                
               0001616 4057 25c2 8f5c 28f6 4057 25c2 8f5c 28f6                
               *                                                              
               0001680 4057 2666 6666 6666 4057 2666 6666 6666                
               0001696 4057 2666 6666 6666 4057 270a 3d70 a3d7                
               0001712 4057 270a 3d70 a3d7 4057 27ae 147a e148                
               0001728 4057 2851 eb85 1eb8 4057 2851 eb85 1eb8                
               0001744 4057 28f5 c28f 5c29 4057 2999 9999 999a                
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               0001776 4057 2b85 1eb8 51ec 4057 2c28 f5c2 8f5c                
               0001792 4057 2ccc cccc cccd 4057 2d70 a3d7 0a3d                
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               0001872 4057 35c2 8f5c 28f6 4057 3666 6666 6666                
               0001888 4057 37ae 147a e148 4057 38f5 c28f 5c29                
               0001904 4057 3a3d 70a3 d70a 4057 3ae1 47ae 147b                
               0001920 4057 3c28 f5c2 8f5c 4057 3d70 a3d7 0a3d                
               0001936 4057 3eb8 51eb 851f 4057 4000 0000 0000                
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               0001984 4057 470a 3d70 a3d7 4057 48f5 c28f 5c29                
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               0002064 4057 570a 3d70 a3d7 4057 5851 eb85 1eb8                
               0002080 4057 5a3d 70a3 d70a 4057 5c28 f5c2 8f5c                
               0002096 4057 5d70 a3d7 0a3d 4057 5f5c 28f5 c28f                
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               0002128 4057 647a e147 ae14 4057 6666 6666 6666                
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               0002240 4057 7eb8 51eb 851f 4057 80a3 d70a 3d71                
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               0002272 4057 8666 6666 6666 4057 8851 eb85 1eb8                
               0002288 4057 8a3d 70a3 d70a 4057 8c28 f5c2 8f5c                
               0002304 4057 8d70 a3d7 0a3d 4057 8f5c 28f5 c28f                
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               0002336 4057 951e b851 eb85 4057 970a 3d70 a3d7                
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               0002496 4057 ba3d 70a3 d70a 4057 bc28 f5c2 8f5c                
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               0002544 4057 c47a e147 ae14 4057 c666 6666 6666                
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               0002672 4057 dd70 a3d7 0a3d 4057 deb8 51eb 851f                
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               0003024 4057 751e b851 eb85 4057 751e b851 eb85                
               0003040 4057 75c2 8f5c 28f6 4057 75c2 8f5c 28f6                
               *                                                              
               0003104 4057 751e b851 eb85 4057 751e b851 eb85                
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               0003168 4057 70a3 d70a 3d71 4057 6f5c 28f5 c28f                
               0003184 4057 6eb8 51eb 851f 4057 6d70 a3d7 0a3d                
                                                                              
                                      ...                                     
                                                                              
               0517808 406e 1666 6666 6666 406e 1ccc cccc cccd                
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               0517984 406e 6333 3333 3333 406e 6666 6666 6666                
               0518000 406e 6999 9999 999a 406e 6999 9999 999a                
               0518016 406e 6ccc cccc cccd 406e 7000 0000 0000                
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               0518096 406e 7999 9999 999a 406e 7999 9999 999a                
               *                                                              
               0518192 406e 7666 6666 6666 406e 7666 6666 6666                
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               0518320 406e 5666 6666 6666 406e 5666 6666 6666                
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               0518368 406e 4333 3333 3333 406e 4000 0000 0000                
               0518384 406e 3ccc cccc cccd 406e 3999 9999 999a                
               0518400